7222009 has 2 divisors, whose sum is σ = 7222010. Its totient is φ = 7222008.

The previous prime is 7222001. The next prime is 7222021. The reversal of 7222009 is 9002227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6943225 + 278784 = 2635^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 7222009 - 2³ = 7222001 is a prime.

It is a Chen prime.

7222009 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7222001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3611004 + 3611005.

It is an arithmetic number, because the mean of its divisors is an integer number (3611005).

Almost surely, 2^7222009 is an apocalyptic number.

It is an amenable number.

7222009 is a deficient number, since it is larger than the sum of its proper divisors (1).

7222009 is an equidigital number, since it uses as much as digits as its factorization.

7222009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 7222009 is about 2687.3795786974. The cubic root of 7222009 is about 193.2944310021.

The spelling of 7222009 in words is "seven million, two hundred twenty-two thousand, nine".